View 6 Photos View 0 Videos 2020 Cummins 18.7 Air Compressor for a Kenworth T400 Recently Updated $489.95 USD WABCO 18.7 Air Compressor, Take off 2020 Kenworth T400 with a Paccar PX9 Engine, Single Cylinder, Cubic ft per min: 18.7, P/N: 5301100 / 9111530200 ConditionUsedFits To Make(s)KENWORTHFits To Model(s)T400Stock Number15604 MLS Number13957411CategoryEngine Air Compressors Last Updated2/20/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 8 Photos View 0 Videos 2004 Cummins ISX 450ST Camshaft for a Peterbilt 378 $699.95 USD Genuine Cummins ISX Injector Camshaft, Measurements: 43" Long and 3.25" Diameter, Take off Cummins ISX450ST Engine with 535,578 miles, Engine Serial: 14044779, Build Date: 11-23-2002,... ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16306 MLS Number14104392CategoryCamshafts Last Updated2/12/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 8 Photos View 0 Videos 2004 Cummins ISX 450ST Camshaft for a Peterbilt 378 $649.95 USD Genuine Cummins ISX Valve Camshaft, Measurements: 43" Long and 2.5" Diameter, Take off Cummins ISX450ST Engine with 535,578 miles, Engine Serial: 14044779, Build Date: 11-23-2002,... ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16305 MLS Number14104391CategoryCamshafts Last Updated2/12/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 9 Photos View 0 Videos 2004 Cummins ISX 450ST Rocker Arm for a Peterbilt 378 $224.95 USD Cummins Rocker Arm Assembly , Take off Cummins ISX450ST Engine with 535,578 miles, Engine Serial: 14044779, Build Date: 11-23-2002, Casting #'s: 4059304 / 4059294 / 4059351 / 026241 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16301 MLS Number14104387CategoryRocker Arms Last Updated2/12/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 10 Photos View 0 Videos 2004 Cummins ISX 450ST Rocker Arm for a Peterbilt 378 $224.95 USD Cummins Rocker Arm Assembly , Take off Cummins ISX450ST Engine with 535,578 miles, Engine Serial: 14044779, Build Date: 11-23-2002, Casting # 4059353 / 4059297 / 026241 / 4059306 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16300 MLS Number14104386CategoryRocker Arms Last Updated2/12/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 7 Photos View 0 Videos 2004 Cummins ISX 450ST Rocker Arm for a Peterbilt 378 $499.95 USD Cummins Rocker Arm Assembly , Take off Cummins ISX450ST Engine with 535,578 miles, Engine Serial: 14044779, Build Date: 11-23-2002, Casting # 3680167, *comes as a set, with both rocker... ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16292 MLS Number14102210CategoryRocker Arms Last Updated2/12/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 6 Photos View 0 Videos 2004 Cummins ISX 450ST Engine Oil Pump for a Peterbilt 378 $59.95 USD Cummins ISX Oil Pump, Take off 2004 Peterbilt 378 with a Cummins ISX450ST Engine with 535,578 miles, P/N: 237320C ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16266 MLS Number14094734CategoryEngine Oil Pumps Last Updated2/12/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 5 Photos View 0 Videos 2004 Cummins ISX 450ST Valve Cover for a Peterbilt 378 $69.95 USD Cummins ISX Valve Cover, P/N: 4059375 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16257 MLS Number14094716CategoryValve Covers Last Updated2/12/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 9 Photos View 0 Videos 2004 Cummins ISX 450ST Engine Block / Cylinder Block for a Peterbilt 378 $3,195 USD Cummins ISX Cylinder / Engine Short Block with Crankshaft, Pistons and Rods, Take off 2004 Peterbilt 378 with a Cummins ISX450ST Engine with 535,578 miles , Only Guaranteed as a... ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16256 MLS Number14094713CategoryEngine Blocks / Cylinder Blocks Last Updated2/12/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 9 Photos View 0 Videos Cummins 8.3 Valve Cover $79.95 USD Cummins ISC Engine Valve Cover, P/N 3967462 / 3967524, ConditionUsedStock Number16004 MLS Number14008848CategoryValve Covers Last Updated1/16/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Cummins NT855 Engine Oil Pan $550 USD AK-3031959 Aftermarket Cummins rear sump NT855, big cam III, IV, N14 oil pan Rear Sump Steel Oil Pan w/Pick-Up Tube Clips, Oil Capacity – 9 Gallons, Upper Suction Pick-Up for Low... ConditionNewStock NumberAK-3031959 MLS Number12893459CategoryEngine Oil Pans Last Updated1/16/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 11 Photos View 0 Videos 2004 Cummins ISX 450ST Engine Thermostat Housing for a Peterbilt 378 $89.95 USD Genuine Cummins ISX Thermostat Housing, Casting # 3683130 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16029 MLS Number14021903CategoryEngine Thermostat Housings Last Updated1/6/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 9 Photos View 0 Videos 2004 Cummins ISX 450ST Engine Thermostat Housing for a Peterbilt 378 $74.95 USD Genuine Cummins Thermostat Housing Cover, Material: Steel, Casting# 3682667 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16024 MLS Number14021898CategoryEngine Thermostat Housings Last Updated1/6/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 1 Photo View 0 Videos 2014 Cummins ISX15 Crankshaft for a Peterbilt 579 $2,495.95 USD Cummins ISX15 crankshaft. OEM #4925762 supersede # 4393462, 5440758, 3691444, 4330732, Visual inspected only. ConditionUsedFits To Make(s)PETERBILTFits To Model(s)579Stock Number14167 MLS Number13679432CategoryCrankshafts Last Updated1/6/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 6 Photos View 0 Videos Cummins 8.3 Engine Part $199.95 USD Fan Drive with Cummins Pilot Adapter, Pilot Adapter P/N: 4038-37053 / 4902732, Casting # 42834 / 42836 ConditionUsedStock Number16002 MLS Number14008846CategoryEngine Miscellaneous Parts Last Updated12/5/2025 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 8 Photos View 0 Videos Cummins 8.3 Engine Part $39.95 USD Oil Filler Tube, Connection and Filler Cap, Engine: Cummins 8.3L, Oil Filler Cap P/N: 4962608 ConditionUsedStock Number15991 MLS Number14008834CategoryEngine Miscellaneous Parts Last Updated12/5/2025 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 10 Photos View 0 Videos Cummins 8.3 Engine Part $115 USD Cummins ISC, ISL Diesel Engine Rocker Housing, Material: Aluminum, Casting# 3967264, P/N: 3967265 ConditionUsedStock Number15989 MLS Number14008826CategoryEngine Miscellaneous Parts Last Updated12/5/2025 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 8 Photos View 0 Videos 2014 Cummins ISX15 Engine Control Module (ECM) for a Peterbilt 579 $500 USD 2012 ISX 15 ECM,CORE, pulled from running ISX, sold as programable core only ESN 79687595, P/N 5290170, S/N 3100785, D/C 09092013, E/C EF10045.14-80000 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)579Stock Number12778 MLS Number13459658CategoryEngine Control Modules (ECM) Last Updated11/19/2025 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 8 Photos View 0 Videos Cummins Engine Part $149.95 USD Cummins Intake Air Heater, Take off a 8.3 Cummins Engine, P/N: 3967274 , Interchange P/N: 4940172 ConditionUsedStock Number15504 MLS Number13927942CategoryEngine Miscellaneous Parts Last Updated10/28/2025 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 3 Photos View 0 Videos Cummins 8.3 Valve Cover $89.95 USD Cummins valve cover. Used condition. See pictures OEM# 3944294 ConditionUsedStock Number11135 MLS Number13123048CategoryValve Covers Last Updated12/18/2025 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 2 Photos View 0 Videos Cummins 6CT 8.3 Engine Oil Pan $250 USD CUMMINS Center sump Oil Pan With pickup tube.. Used condition. See pictures OEM# 3914015 C Series, 8.3, 8.9, 9.3 ConditionUsedStock Number11136 MLS Number13123049CategoryEngine Oil Pans Last Updated6/17/2025 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info